Insert sill extrusion



FIG. 1 is a perspective view of the insert sill extrusion showing my newdesign;

FIG. 2 is a right side elevation thereof;

FIG. 3 is a front elevation thereof;

FIG. 4 is a left side elevation thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a top plan view thereof; and

FIG. 7 is a bottom plan view thereof.

The ornamental design for a insert sill extrusion, as shown anddescribed.